package com.qd.flow.service.config;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.cdqidi.constant.ConstantDto;
import com.cdqidi.db.BaseService;
import com.cdqidi.dict.OperatorDictTemplate;
import com.cdqidi.dto.CacheKey;
import com.cdqidi.exception.ApiException;
import com.cdqidi.util.RedisTemplateUtil;
import com.qd.common.flow.domain.config.FlowProcessNodeDTO;
import com.qd.common.sys.enums.BaseTableEnum;
import com.qd.flow.mapper.config.FlowProcessNodeMapper;
import com.qd.flow.model.config.FlowProcessNode;
import com.qd.flow.service.bill.FlowBillService;
import com.qd.system.service.dict.MbUtil;
import com.qd.system.service.org.OrgService;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.StringUtils;

import javax.annotation.Resource;
import java.util.*;

import static java.util.stream.Collectors.toList;

/**
 * 流程节点配置
 *
 * @author sjk
 */
@RequiredArgsConstructor
@Service
@Slf4j
public class FlowProcessNodeService extends BaseService<FlowProcessNodeMapper, FlowProcessNode> {

    private static final String PREFIX_ID = "flow_process_node_nodeId_{0}";
    private static final String PREFIX_PROCESS_LIST = "flow_process_node_processId_{0}";

    private final RedisTemplateUtil<FlowProcessNode> redisTemplateUtil;

    private final OrgService orgService;
    private final FlowBillService flowBillService;
    @Resource
    private OperatorDictTemplate operatorDictTemplate;

    /**
     * 保存
     *
     * @param dto 页面对象
     * @return 页面对象
     */
    @Transactional(rollbackFor = Exception.class)
    public FlowProcessNodeDTO save(FlowProcessNodeDTO dto) {
        if (Boolean.TRUE.equals(flowBillService.running(dto.getProcessId()))) {
            throw new ApiException("存在正在进行中的流程，不能添加");
        }
        validator(dto);
        final FlowProcessNode model = dtoToModel(dto);
        try {
            if (super.save(model)) {
                return modelToDto(model);
            }
            throw new ApiException("添加失败");
        } finally {
            clearCache(model);
            model.freeData();
        }
    }

    /**
     * 修改
     *
     * @param dto 页面对象
     * @return 页面对象
     */
    @Transactional(rollbackFor = Exception.class)
    public FlowProcessNodeDTO update(FlowProcessNodeDTO dto) {
        if (Boolean.TRUE.equals(flowBillService.running(dto.getProcessId()))) {
            throw new ApiException("存在正在进行中的流程，不能修改");
        }
        validator(dto);
        final FlowProcessNode historyModel = Optional.ofNullable(getById(dto.getNodeId())).orElseThrow(() -> new ApiException("ID不存在,不能更新"));
        final FlowProcessNode model = dtoToModel(dto);
        try {
            if (super.updateById(model)) {
                return modelToDto(model);
            }
            throw new ApiException("更新失败");
        } finally {
            clearCache(historyModel);
            historyModel.freeData();
            model.freeData();
        }
    }

    /**
     * 批量添加
     *
     * @param mList 数据库对象
     */
    @Transactional(rollbackFor = Exception.class)
    public void saveBatch(List<FlowProcessNode> mList) {
        try {
            if (!super.saveBatch(mList)) {
                throw new ApiException("批量添加失败");
            }
        } finally {
            clearCaches(mList);
        }
    }

    /**
     * 批量更新
     *
     * @param mList 数据库对象
     */
    @Transactional(rollbackFor = Exception.class)
    public void updateBatchIds(List<FlowProcessNode> mList) {
        final List<String> ids = mList.stream().map(FlowProcessNode::getNodeId).collect(toList());
        final List<FlowProcessNode> historyModelList = checkIds(ids);
        try {
            if (!super.updateBatchById(mList)) {
                throw new ApiException("批量更新失败");
            }
        } finally {
            clearCaches(historyModelList);
            historyModelList.clear();
            ids.clear();
        }
    }

    /**
     * 删除，单个
     *
     * @param nodeId 主键
     */
    public void removeById(String nodeId) {
        final FlowProcessNode historyModel = Optional.ofNullable(getById(nodeId)).orElseThrow(() -> new ApiException("数据不存在,不能删除"));
        if (Boolean.TRUE.equals(flowBillService.running(historyModel.getProcessId()))) {
            throw new ApiException("存在正在进行中的流程，不能删除");
        }
        try {
            if (!super.removeById(nodeId)) {
                throw new ApiException("删除失败");
            }
        } finally {
            clearCache(historyModel);
            historyModel.freeData();
        }
    }

    /**
     * 批量删除
     *
     * @param ids 主键集合
     */
    public void removeBatchIds(List<String> ids) {
        ids.forEach(this::removeById);
    }

    /**
     * 根据传入对象构建查询参数，判断是否存在
     *
     * @param dto 参数
     * @return 存在为true
     */
    @Transactional(readOnly = true)
    public Boolean isExists(FlowProcessNodeDTO dto) {
        final QueryWrapper<FlowProcessNode> queryWrapper = createQueryWrapper(dto);
        final boolean exists = super.count(queryWrapper) > 0;
        queryWrapper.clear();
        return exists;
    }

    /**
     * 根据主键判断数据是否存在
     *
     * @param nodeId 主键
     * @return 存在为true
     */
    @Transactional(readOnly = true)
    public Boolean isExistsById(String nodeId) {
        boolean exists = false;
        if (StringUtils.hasLength(nodeId)) {
            final FlowProcessNode model = getById(nodeId);
            exists = (null != model);
            if (exists) {
                model.freeData();
            }
        }
        return exists;
    }

    /**
     * 根据主键获取数据
     *
     * @param nodeId 主键
     * @return 单条记录
     */
    public FlowProcessNode getById(String nodeId) {
        final String key = RedisTemplateUtil.getRedisCacheKey(PREFIX_ID, nodeId);
        return redisTemplateUtil.get(new CacheKey().setKey(key).setTimeout(ConstantDto.REDIS_TIME_OUT_DAY), () -> super.getById(nodeId), FlowProcessNode.class);
    }

    /**
     * 根据主键获取数据
     *
     * @param nodeId 主键
     * @return 单条记录，转换成页面对象
     */
    @Transactional(readOnly = true)
    public FlowProcessNodeDTO getByIdDto(String nodeId) {
        return Optional.ofNullable(getById(nodeId)).map(this::modelToDto).orElse(null);
    }

    /**
     * 根据条件查询单条数据
     *
     * @param dto 查询参数
     * @return 单条记录
     */
    public FlowProcessNode getOne(FlowProcessNodeDTO dto) {
        final QueryWrapper<FlowProcessNode> queryWrapper = createQueryWrapper(dto);
        FlowProcessNode model = super.getOne(queryWrapper);
        queryWrapper.clear();
        return model;
    }

    /**
     * 根据条件查询单条数据
     *
     * @param dto 查询参数
     * @return 单条记录，转换成页面对象
     */
    public FlowProcessNodeDTO getOneDto(FlowProcessNodeDTO dto) {
        return Optional.ofNullable(getOne(dto)).map(this::modelToDto).orElse(null);
    }

    /**
     * 根据条件查询列表数据
     *
     * @param dto 查询参数
     * @return 列表数据
     */
    public List<FlowProcessNode> getList(FlowProcessNodeDTO dto) {
        final QueryWrapper<FlowProcessNode> queryWrapper = createQueryWrapper(dto);
        final List<FlowProcessNode> list = super.list(queryWrapper);
        queryWrapper.clear();
        return list;
    }

    /**
     * 根据条件查询列表数据
     *
     * @param dto 查询参数
     * @return 列表数据，转换成页面对象
     */
    @Transactional(readOnly = true)
    public List<FlowProcessNodeDTO> getListDto(FlowProcessNodeDTO dto) {
        return modelToDtoList(getList(dto));
    }

    /**
     * 分页数据
     *
     * @param page 分页对象
     * @param dto  查询参数
     * @return 分页信息
     */
    @Transactional(readOnly = true)
    public IPage<FlowProcessNodeDTO> page(Page<FlowProcessNode> page, FlowProcessNodeDTO dto) {
        final QueryWrapper<FlowProcessNode> queryWrapper = createQueryWrapper(dto);
        Page<FlowProcessNode> iPage = baseMapper.selectPage(page, queryWrapper);
        Optional.ofNullable(iPage.getRecords()).ifPresent(this::modelToDtoList);
        queryWrapper.clear();
        return iPage.convert(this::modelToDto);
    }

    /**
     * 清空缓存
     *
     * @param model 数据库对象
     */
    public void clearCache(FlowProcessNode model) {
        if (null == model) {
            return;
        }
        redisTemplateUtil.deleteByKey(RedisTemplateUtil.getRedisCacheKey(PREFIX_ID, model.getNodeId()));
        redisTemplateUtil.deleteByKey(RedisTemplateUtil.getRedisCacheKey(PREFIX_PROCESS_LIST, model.getProcessId()));
    }

    /**
     * 批量清空缓存
     *
     * @param list 数据库对象
     */
    public void clearCaches(List<FlowProcessNode> list) {
        if (null == list || list.isEmpty()) {
            return;
        }
        List<String> ids = list.stream().map(model -> RedisTemplateUtil.getRedisCacheKey(PREFIX_ID, model.getNodeId())).collect(toList());
        if (!ids.isEmpty()) {
            redisTemplateUtil.deleteByKey(ids);
            ids.clear();
        }
    }

    /**
     * 数据库对象转页面对象
     *
     * @param model 数据库对象
     * @return 页面对象
     */
    public FlowProcessNodeDTO modelToDto(FlowProcessNode model) {
        if (null == model) {
            return null;
        }
        final FlowProcessNodeDTO dto = new FlowProcessNodeDTO();
        dto.setNodeId(model.getNodeId());
        dto.setNodeName(model.getNodeName());
        dto.setNodeNumber(model.getNodeNumber());
        dto.setAddTime(model.getAddTime());
        dto.setUpdateTime(model.getUpdateTime());
        dto.setProcessId(model.getProcessId());
        dto.setOrgId(model.getOrgId());
        dto.setOperator(model.getOperator());
        dto.setEnable(model.getEnable());
        dto.setApprovalDepart(model.getApprovalDepart());
        buildDisplay(dto);
        return dto;
    }

    /**
     * 页面对象转数据库对象
     *
     * @param dto 页面对象
     * @return 数据库对象
     */
    public FlowProcessNode dtoToModel(FlowProcessNodeDTO dto) {
        if (null == dto) {
            return null;
        }
        final FlowProcessNode model = new FlowProcessNode();
        model.setNodeId(dto.getNodeId());
        model.setNodeName(dto.getNodeName());
        model.setNodeNumber(dto.getNodeNumber());
        model.setAddTime(dto.getAddTime());
        model.setUpdateTime(dto.getUpdateTime());
        model.setProcessId(dto.getProcessId());
        model.setOrgId(dto.getOrgId());
        model.setOperator(dto.getOperator());
        model.setEnable(dto.getEnable());
        model.setApprovalDepart(dto.getApprovalDepart());
        return model;
    }

    /**
     * 码表转换
     *
     * @param dto 页面对象
     */
    public void buildDisplay(FlowProcessNodeDTO dto) {
        operatorDictTemplate.execute(dto);
    }

    /**
     * 数据库对象转页面对象
     *
     * @param list 数据库对象
     * @return 页面对象
     */
    public List<FlowProcessNodeDTO> modelToDtoList(List<FlowProcessNode> list) {
        return Optional.ofNullable(list).orElse(Collections.emptyList()).stream().map(this::modelToDto).collect(toList());
    }

    /**
     * 页面对象转数据库对象
     *
     * @param list 页面对象
     * @return 数据库对象
     */
    public List<FlowProcessNode> dtoToModelList(List<FlowProcessNodeDTO> list) {
        return Optional.ofNullable(list).orElse(Collections.emptyList()).stream().map(this::dtoToModel).collect(toList());
    }

    /**
     * 拼装查询参数，除了主键的其他字段会自动加入进来
     *
     * @param dto 查询参数，不为空的属性会被自动加入
     */
    public QueryWrapper<FlowProcessNode> createQueryWrapper(FlowProcessNodeDTO dto) {
        final QueryWrapper<FlowProcessNode> queryWrapper = new QueryWrapper<>();
        if (null != dto) {
            if (StringUtils.hasLength(dto.getNodeName())) {
                queryWrapper.like("node_name", dto.getNodeName());
            }
            if (null != dto.getNodeNumber()) {
                queryWrapper.eq("node_number", dto.getNodeNumber());
            }
            if (StringUtils.hasLength(dto.getProcessId())) {
                queryWrapper.eq("process_id", dto.getProcessId());
            }
            if (StringUtils.hasLength(dto.getEnable())) {
                queryWrapper.eq("enable", dto.getEnable());
            }
            if (StringUtils.hasLength(dto.getApprovalDepart())) {
                queryWrapper.eq("approval_depart", dto.getApprovalDepart());
            }
        }
        queryWrapper.orderByAsc("node_number");
        return queryWrapper;
    }

    /**
     * 批量检查主键在数据库中是否存在
     *
     * @param ids 主键集合
     * @return 主键查询出来的集合
     */
    public List<FlowProcessNode> checkIds(List<String> ids) {
        if (null == ids || ids.isEmpty()) {
            throw new ApiException("ids不能为空");
        }
        final List<FlowProcessNode> list = super.listByIds(ids);
        if (list.isEmpty()) {
            throw new ApiException("ids不存在" + Arrays.toString(ids.toArray()));
        }
        if (ids.size() == list.size()) {
            return list;
        }
        List<String> dbIds = list.stream().map(FlowProcessNode::getNodeId).collect(toList());
        final List<String> notExistsList = ids.stream().filter(id -> !dbIds.contains(id)).collect(toList());
        dbIds.clear();
        if (!notExistsList.isEmpty()) {
            throw new ApiException("ids不存在" + Arrays.toString(notExistsList.toArray()));
        }
        return list;
    }

    @Transactional(readOnly = true)
    public List<FlowProcessNodeDTO> getByProcessIdDTO(String processId) {
        return modelToDtoList(getByProcessId(processId));
    }

    public List<FlowProcessNode> getByProcessId(String processId) {
        return redisTemplateUtil.getList(new CacheKey().setKey(RedisTemplateUtil.getRedisCacheKey(PREFIX_PROCESS_LIST, processId)).setTimeout(ConstantDto.REDIS_TIME_OUT_DAY), () -> {
            QueryWrapper<FlowProcessNode> queryWrapper = new QueryWrapper<>();
            queryWrapper.eq("process_id", processId);
            queryWrapper.orderByAsc("node_number");
            List<FlowProcessNode> flowProcessNodes = getBaseMapper().selectList(queryWrapper);
            queryWrapper.clear();
            return flowProcessNodes;
        }, FlowProcessNode.class);
    }

    public FlowProcessNode getMin(String processId) {
        List<FlowProcessNode> list = getByProcessId(processId);
        if (null == list || list.isEmpty()) {
            return null;
        }
        return list.stream().min(Comparator.comparingInt(FlowProcessNode::getNodeNumber)).orElse(null);
    }

    public FlowProcessNodeDTO getMinDTO(String processId) {
        return modelToDto(getMin(processId));
    }

    public FlowProcessNode getMax(String processId) {
        List<FlowProcessNode> list = getByProcessId(processId);
        if (null == list || list.isEmpty()) {
            return null;
        }
        return list.stream().max(Comparator.comparingInt(FlowProcessNode::getNodeNumber)).orElse(null);
    }

    public FlowProcessNodeDTO getMaxDTO(String processId) {
        return modelToDto(getMax(processId));
    }

    private void validator(FlowProcessNodeDTO dto) {
        if (StringUtils.hasLength(dto.getEnable())) {
            if (MbUtil.isNotExists(dto.getEnable(), BaseTableEnum.SF)) {
                throw new ApiException("是否启用值错误");
            }
        } else {
            dto.setEnable(ConstantDto.SF1);
        }
        if (Boolean.FALSE.equals(orgService.isExistsById(dto.getApprovalDepart()))) {
            throw new ApiException("审批部门值错误");
        }
    }

    @Transactional(rollbackFor = Exception.class)
    public void removeByProcessId(String processId) {
        List<FlowProcessNode> list = getByProcessId(processId);
        if (!list.isEmpty()) {
            List<String> ids = list.stream().map(FlowProcessNode::getNodeId).collect(toList());
            removeBatchIds(ids);
        }
    }

    @Transactional(readOnly = true)
    public Boolean isLasNode(String nodeId) {
        FlowProcessNode flowProcessNode = Optional.of(getById(nodeId)).orElseThrow(() -> new ApiException("节点ID值错误"));
        Integer nodeNumber = flowProcessNode.getNodeNumber();
        FlowProcessNode processNode = getMax(flowProcessNode.getProcessId());
        boolean b = processNode.getNodeNumber().equals(nodeNumber);
        processNode.freeData();
        flowProcessNode.freeData();
        return b;
    }

    @Transactional(readOnly = true)
    public FlowProcessNodeDTO getNext(String nodeId) {
        FlowProcessNode flowProcessNode = Optional.of(getById(nodeId)).orElseThrow(() -> new ApiException("节点ID值错误"));
        FlowProcessNodeDTO query = new FlowProcessNodeDTO();
        query.setProcessId(flowProcessNode.getProcessId());
        query.setNodeNumber(flowProcessNode.getNodeNumber() + 1);
        FlowProcessNodeDTO oneDto = getOneDto(query);
        query.freeData();
        return oneDto;
    }
}